One who entertains crowd (4)
I believe the answer is:
host
I believe this clue is a double definition.
'one who entertains' is the first definition.
(I've seen this before)
'crowd' is the second definition.
(I've seen this before)
(Other definitions for host that I've seen before include "lot of people" , "Army; publican" , "Master of ceremonies" , "Multitude -- MC" , "Entertainer of guests" .)